/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2015-2017 decimal4j (tools4j), Marco Terzer
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.decimal4j.op.util;

import java.util.Arrays;
import java.util.Set;
import java.util.TreeSet;

import org.decimal4j.scale.ScaleMetrics;
import org.decimal4j.scale.Scales;
import org.decimal4j.test.TestSettings;

public class UnscaledUtil {

	public static long[] getSpecialUnscaledOperands(int scale) {
		int valueScale = scale;
		valueScale = Math.max(Scales.MIN_SCALE, valueScale);
		valueScale = Math.min(Scales.MAX_SCALE, valueScale);
		return TestSettings.TEST_CASES.getSpecialValuesFor(Scales.getScaleMetrics(valueScale));
	}

	public static Set<Integer> getScales(ScaleMetrics scaleMetrics) {
		final int scale = scaleMetrics.getScale();
		final Set<Integer> vals = new TreeSet<Integer>();
		switch (TestSettings.TEST_CASES) {
		case TINY:
			vals.addAll(Arrays.asList(-1, 0, scale - 1, scale, scale + 1, 18, 19));
			break;
		case SMALL:
			vals.addAll(Arrays.asList(-1, 0, 1, scale - 1, scale, scale + 1, 17, 18, 19));
			break;
		case STANDARD:
			vals.addAll(Arrays.asList(-10, -1, 0, 1, scale - 1, scale, scale + 1, 17, 18, 19, 30));
			break;
		case LARGE:
			vals.addAll(Arrays.asList(-10, -1, 0, 1, scale - 1, scale, scale + 1, 17, 18, 19, 30));
			break;
		case ALL:
			vals.addAll(Arrays.asList(-100, -20, -10, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
					17, 18, 19, 20, 25, 30, 100));
			break;
		default:
			throw new RuntimeException("illegal test cases: " + TestSettings.TEST_CASES);
		}
		return vals;
	}

	private UnscaledUtil() {
		super();
	}
}
